Single-acting engine



Aug. M, 3923.

O. E. JORGENSEN SINGLE ACTING ENGINE Filed April 19 1920 f Y/ /)j INVENTOR ATTORNEYS Patented Aug. M, 1923.

Uhllllfi STATES OLAV ESKIL JORGENSEN, OF NEW YORK, N. Y.

sworn-norms ENGINE.

Application filed April 19, 1920. Serial No. 374,900.

To all. whom it may concern:

Be it known that I, OLAV EsKn. JoiionN- SEN, a subject of the Kingdom of Denmark, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Single- Acting Engines, fully described andv re re sented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to an improvement in single acting engines and more particularly, single acting internal combustion engines.

It is the object of the invention to provide means for preventing dirty lubricating oil, from the combustion chamber, from flowing into the crank case, and to'prevent oil in the crank case from working its way into the cylinder.

With this general object in view, the in- I vention consists in the combinations, details of construction'and arrangement of parts which will first be described in connection with the accompanying drawing and then more particularly pointed out.

In the drawing Fig. 1 is a view in vertical'section or" an engine constructed in accordance with the invention;

Fig. 2 is a similar View of a modification; and

Fig. 3 is a sectional view of a further modification.

Referring to the drawing, in the exemplification shown in Fig. 1, 3 represents the crank case of a single-action, internal combustion engine. Above the crank case is the cylinder 4 in which reciprocates a piston. 5.

The invention includes a partition between the cylinder and the crank case, through which partition reciprocates an extension of the piston. Although capable of various constructions, in the embodiment shown in Fig. 1, as-an example, at the top of the crank case there is formed a horizontal partition 6 terminatin in cylindrical bearing or guide flange 7. ciprocating in the latter, is a trunk-like piston extension 8 havin an unbroken surface. in the particular em odiment shown, the extension 8 is formed integral with the iston, but is of somewhat less diameter. T us there is provided, between the piston-extension and the cylinder wall, a space 9 for collecting waste oil from the combustion. chamber. this space communicates with a channel 10 formed in the upper face of the partition 6. In connection with this channel 10, cleaning openings 11 are provided.

The invention includes a yieldable oilscraping ring carried by the partition. Al-

though capable of various constructions, in

the particular embodiment shown in Fig. .1, carried by the partition 6 so as to embrace the piston-extension is an oil-scraping ring 12, preferably of metal, and arranged to fit the extension snugly but to yield in the manner of a piston ring.

With the construction described, the lubrirating oil on the cylinder wall and on the piston is caught or scraped 0E by the par tition and is thus prevented from reaching the crank case. Furthermore, oil spatterings in the crank case, in the direction of the cylinder, are confined in the crank case by the partition and the crank case oil cannot work up into the cylinder because it is scraped oil by the scraping ring. It will be noted that with the partition and the piston-extension described there is no way by which the crank case oil can avoid the scraping ring.

In the form described, the piston is relatively short and the bearing or flan e 7 serves as a ide. In the modification i lus trated in Fig. 2 the piston 13 is of suiiicient length to be self-guided. Associated with the piston is a cylindrical extension which is here shown as a sleeve of light material set into the piston and having unbroken surface. As in the form of Fig.

.1, there is a space 15 between the extension lell and the cylinder, for the collection of ()1 lhere is provided a partition 16 between the crank case and the cylinder that is similar to the partition 6 except that there is no guide portion, as the piston is selfguided. The partition 16 carries a scrapmg ring 17 similar to the one already described. The partition 16 also has an oil collecting channel 18 communicating with the space 15 and there is provided one or more cleaning openings 19.

In the further embodiment illustrated in Fig. 3, the iston 20 has an extension 21 similar to t e extension shown in Fig. 1 and arranged to leave a s ace 22 between itself and the cylinder. tween the cylinder and the crank case con prises a ring 23 surrounding the piston-exe partition betension, and a horizontal frame member 24 which supports the ring 23 in any suitable manner. he ring 23 is rabbeted, as shown, to provide space for two scraping rings 25, 26 set one above the other. These scra ing rin shave their inner faces at a s lght ang e to the piston-extension in the mannerillustrated, the apex of this angle being at the bottom of the rings. These scraping rings are held in place by a ring 27 supported by a frame member28.

The space 22 between the piston-extension and the cylinder communicates with the upper surface of the partition which may have a channel as in the other forms. The partition is accessible for cleaning through one or more openings 29.

With the construction described the oil in the cylinder is prevented by the partition from reaching the crank case. Further, the double scrapmg ring effectively prevents the crank case oil from working up into the clinder and there is substantially no impe iment to the downward movement of the piston.

It is to be understood that the scraping rings of the forms shown in Figs. 1 and 2 may also have their inner faces at an angle to the piston-extension.

What I claim is: M

1. In an engine, the combination with a crank case, a cylinder and a piston, of an extension having an unbroken surfaceassociated with the piston, a partition between the crank case and the cylinder through which said piston-extension reciprocates, and a yieldable, oil-scraping ring associated with the partition to embrace the piston-extens1on.

2. In an engine, the combination with a crank case, a cylinder and a piston, of an extension having an unbroken'surface associated with the piston, a partition between the crank case and the cylinder through which said piston-extension -reciprocates, and a yieldable, metal, oil-scraping ring associated with thepartition to embrace the piston-extension,

3. In an engine, the combination with a. crank case, a cylinder and a piston, of an extension having an unbroken surface associated with the piston so as to leave an oil collecting space between itself and the wall of the cylinder, a partition between the crank case and the cylinder, and a pair of yieldable, oil scraping rings associated with the partition to embrace the piston extension, said oil-scraping rings being positioned one above the other and having their inner faces at a slight angle to the pistonextension.

In testimony whereof, I have hereunto set my hand.

OLAV ESKIL JORGENSEN. 

